1 Data set overview



  year    dataSet       station                freq   date_start    date_end   pairing      type
------ ---------- ------------- ------------------- ------------ ----------- --------- ---------
  2021    2021-BE       grafton   70kHz and 200 kHz    7/12/2021   8/30/2021         2   control
  2021    2021-BE    birkenfels   70kHz and 200 kHz    7/12/2021   8/30/2021         1   control
  2021    2021-BE        cpower                Lost    7/12/2021   8/30/2021         2       OWF
  2021    2021-BE       belwind   70kHz and 200 kHz    7/12/2021   8/30/2021         1       OWF
  2023    2023-BE       belwind   70kHz and 200 kHz     7/5/2023    9/3/2023         1       OWF
  2023    2023-BE        cpower              70 kHz     7/5/2023    9/3/2023         2       OWF
  2023    2023-BE    gardencity   70kHz and 200 kHz     7/5/2023    9/3/2023         1   control
  2023    2023-BE       grafton   70kHz and 200 kHz     7/5/2023    9/3/2023         2   control
  2023   2023-BSW   267814 BSW3               70kHz     5/7/2023   6/16/2023         2       OWF
  2023   2023-BSW   267838 BSW4   70kHz and 200 kHz     5/7/2023   6/16/2023         1       OWF
  2023   2023-BSW   274174 BSW1   70kHz and 200 kHz     5/7/2023   6/16/2023         1   control
  2023   2023-BSW   278093 BSW2   70kHz and 200 kHz     5/7/2023   6/16/2023         2   control
  2024    2024-BE        cpower   70kHz and 200 kHz    10/4/2023   12/4/2023         1       OWF
  2024    2024-BE       grafton   70kHz and 200 kHz    10/4/2023   12/4/2023         1   control

The time series are shown below for the CPOD data (1.1) and WBAT data at 70 kHz (1.2) and 200 kHz (1.3).

Time series of CPOD recordings per pair and data sets.

Figure 1.1: Time series of CPOD recordings per pair and data sets.

Time series of WBAT recordings @70khz per pair and data sets.

Figure 1.2: Time series of WBAT recordings @70khz per pair and data sets.

Time series of WBAT recordings @200khz per pair and data sets.

Figure 1.3: Time series of WBAT recordings @200khz per pair and data sets.

2 Comparison of fish biomass - OWF vs control

From Figures 2.1 and 2.2:

Boxplot of acoustic density (SA) @70kHz at OWF and control sites for day and night periods.

Figure 2.1: Boxplot of acoustic density (SA) @70kHz at OWF and control sites for day and night periods.

Boxplot of acoustic density (SA) @70kHz at OWF and control sites for day and night periods.

Figure 2.2: Boxplot of acoustic density (SA) @70kHz at OWF and control sites for day and night periods.

3 HP presence and activity

From Figures 3.1, HP presence is higher at the control sites. When standardized as hour positive minutes, one can observed comparable results 3.2.

Boxplot of Harbor porpoise daily presence at control and OWF sites.

Figure 3.1: Boxplot of Harbor porpoise daily presence at control and OWF sites.

Boxplot of Harbor porpoise hour positive minutes at control and OWF sites.

Figure 3.2: Boxplot of Harbor porpoise hour positive minutes at control and OWF sites.

4 Fish biomass vs HP presence

HP presence seems to be associated with higher biomass, i.e. Figures 4.1 and 4.2. Though there is variations in day/night periods and between sites (Figure 4.3 and 4.4).

Boxplot of acoustic density (SA) @70kHz with presence and absence of Harbor porpoise at OWF and control sites.

Figure 4.1: Boxplot of acoustic density (SA) @70kHz with presence and absence of Harbor porpoise at OWF and control sites.

Boxplot of acoustic density (SA) @200kHz with presence and absence of Harbor porpoise at OWF and control sites.

Figure 4.2: Boxplot of acoustic density (SA) @200kHz with presence and absence of Harbor porpoise at OWF and control sites.

Boxplot of acoustic density (SA) @70kHz with presence and absence of Harbor porpoise. Results are shown per data sets over day and night periods.

Figure 4.3: Boxplot of acoustic density (SA) @70kHz with presence and absence of Harbor porpoise. Results are shown per data sets over day and night periods.

Boxplot of acoustic density (SA) @200kHz with presence and absence of Harbor porpoise. Results are shown per data sets over day and night periods.

Figure 4.4: Boxplot of acoustic density (SA) @200kHz with presence and absence of Harbor porpoise. Results are shown per data sets over day and night periods.

5 Fish biomass vs HP PPM

There is a possible increase of PPM biomass, i.e. Figures 5.1 and 5.2. The increase is more pronouced at 200 kHz. The results are further broken down in to day/night periods in Figures 5.3 and 5.4

Boxplot of acoustic density (SA) @70kHz in different porpoise positive minute bins. Results combine data at the control and OWF sites.

Figure 5.1: Boxplot of acoustic density (SA) @70kHz in different porpoise positive minute bins. Results combine data at the control and OWF sites.

Boxplot of acoustic density (SA) @200kHz in different porpoise positive minute bins. Results combine data at the control and OWF sites.

Figure 5.2: Boxplot of acoustic density (SA) @200kHz in different porpoise positive minute bins. Results combine data at the control and OWF sites.

Boxplot of acoustic density (SA) @70kHz in different porpoise positive minute bins. Results combine data at the control and OWF sites for day/night period.

Figure 5.3: Boxplot of acoustic density (SA) @70kHz in different porpoise positive minute bins. Results combine data at the control and OWF sites for day/night period.

Boxplot of acoustic density (SA) @200kHz in different porpoise positive minute bins. Results combine data at the control and OWF sites for day/night period.

Figure 5.4: Boxplot of acoustic density (SA) @200kHz in different porpoise positive minute bins. Results combine data at the control and OWF sites for day/night period.